This TV classic first hit the airwaves 27 years ago on July 5, 1989. Back then, it was “The Seinfeld Chronicles” and Kramer was Kessler, George had way more hair, Jerry apparently played darts and Elaine was an invisible ex-girlfriend.

The adventure begins and ends with a conversation about a button on a dress shirt, but even for “The Show About Nothing,” a lot happened over the course of its nine-year, nine-season, 180-episode run. And while you might say you know “Seinfeld,” do you? Test your knowledge with this quiz and find out whether you really are sponge-worthy, or just a mimbo. (Not that there’s anything wrong with that.) Giddyup!